{
  "manageEntity": {
    "action": "Save",
    "entityId": "723038",
    "entityType": "Track",
    "nonce": "0xd894abcaf9acdba7ff849a12b10fd0d3b3be45e8176ecd8500daedf4e5d1e335",
    "signature": "0xf24ca50e809202be18d477e826c656e961e4073b1ba866084d61525dc2d2667466ed55eaa35691867c23a45eef89a9d37f06410fe346f043d27bc27e0952fa2f1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}